CVE-2026-0885

MediumCVSS 6.5/10Last modified Jun 17, 2026

Description

Use-after-free in the JavaScript: GC component. This vulnerability was fixed in Firefox 147, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L

Weakness enumeration

CWE-416

Affected software

Vendor	Product	Versions
Mozilla	Firefox	—
Mozilla	Thunderbird	—

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2003607Permissions Required
https://www.mozilla.org/security/advisories/mfsa2026-01/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-03/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-04/Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2026-05/Vendor Advisory

Timeline

Published: Jan 13, 2026
Last modified: Jun 17, 2026
NVD status: Modified

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